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Q&A for CMMG 22LR Mk4 Barrel Kits w/ Bolt Group — 17 Questions & 17 Answers

Name CMMG 22LR Mk4 Barrel Kits w/ Bolt Group (4.9)
As Low As $299.49 Save Up to 17%
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Q
Chris, guest, from WA, United States, asked on September 20, 2019

Does this BCG require a buffer tube?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on October 07, 2019

No, it does not.

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Q
Stildo, member, from OK, United States, asked on November 08, 2018

Does this require a gas block?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on September 13, 2019

No, a gas block is not required.

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Q
Nathan Miller, member, from NC, United States, asked on June 28, 2023

Can this be used in an AR with a laws folding stock adapter?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on June 29, 2023

Yes, the CMMG 22LR Mk4 Barrel Kits w/ Bolt Group can be used with a Law Tactical Folder.

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Q
Craig, member, from NY, United States, asked on October 23, 2022

What's the thread on the barrel? 1/2x36?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on October 27, 2022

The CMMG 22LR Mk4 Barrel Kits w/ Bolt Group feature 1/2x28 threads.

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Q
fede, member, from FL, United States, asked on June 19, 2022

what is the length of the barrel?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on October 14, 2022

The CMMG 22LR Mk4 Barrel Kit MPN:22D5B6E features a 4.5" barrel. MPN:22D8FEF features a 9" barrel. And MPN:22D7C6C features a 16.1" barrel.

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Q
Julian Zurca, member, from TX, United States, asked on September 13, 2021

Does this include handguard and collar?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on June 02, 2022

The CMMG, Inc 22LR Mk4 Barrel Kits w/ Bolt Group does not include a handguard. It is designed to be installed into your existing upper to a dedicated .22LR. Just purchase a magazine and you are ready to go.

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Q
Oaktree, member, from FL, United States, asked on February 04, 2021

Is this a delayed blowback BCG?

Expert Answer
A
Answered by Ben, Gear Expert, from UT, United States, on September 09, 2021

Please email us at techsales@opticsplanet.com so we can further answer your question.

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Q
Daddyd23, member, from TX, United States, asked on November 01, 2020

Does this include the collar?

Expert Answer
A
Answered by Ben, Gear Expert, from UT, United States, on September 09, 2021

Please email us at techsales@opticsplanet.com so we can further answer your question.

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A
Answered by John, member, from MN, United States, on June 02, 2021

A standard 556 or 223 charging handle will work, but CMMG’s 22LR specific one is made so the 22LR casings don’t get jammed in it.

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Expert Answer
A
Answered by Ben, Gear Expert, from UT, United States, on September 09, 2021

Please email us at techsales@opticsplanet.com so we can further answer your question.

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Last updated 2025-11-12 UTC.